Sounds like you maybe broke the shaft off between the torque converter and pump. Need to put a gauge on it to see if you have pump pressure. Not familiar enough with that particular type of trans to tell you where the test port is.

That trans has a problem with the pump shafts wearing out on them, and as a result they leak pressure. also the servo pin can break resulting in a no forward movement, but yours doesn't back up either. Is the fluid high on the dipstick? If it is, the pump went bad. It also could be a t.converter because ford had problems with those from 95 to 99.